Create LaTeX table from selected text in Google Spreadsheet

latexify.js

function latexify() {  
  var app = UiApp.createApplication();
  height = "400"
  width = "500"
  app.setHeight(height)
  app.setWidth(width)
  app.setTitle("LaTeXified!")
  panel = app.createVerticalPanel()
  panel.setHeight("350");
  panel.setWidth(width);
  ta = app.createTextArea();
  ta.setName("ta").setId("ta");
  ta.setSize(width, "350");
  panel.add(ta);
  app.add(panel);
  close = app.createButton("Close")
  close.setId("close")
  horiz = app.createHorizontalPanel()
  horiz.add(close)
  app.add(horiz)
  var doc = SpreadsheetApp.getActive()
  
  
  var range = SpreadsheetApp.getActiveRange();  
  var numRows = range.getNumRows();  
  var numCols = range.getNumColumns();  
  var values = range.getValues();  
  var cs = new Array(numCols);  
  var strRows = "";   
    
  for(var k = 0; k < numCols; k++){  
   cs[k] = 'c';  
  }  
  strRows = "\\begin{table}[ht]\n";  
  strRows += "\\centering\n";  
  strRows += "\\begin{tabular}";  
  //strRows += "{|" + cs.join("|") + "|}\n"
  strRows += "{" + cs.join("") + "}\n"
  strRows += "\\toprule\n";  
    
  for (var i = 0; i <= numRows - 1; i++) {  
    var row = values[i];      
   for (var j = 0; j <= numCols - 1; j++){  
    var cell = row[j];  
    strRows = strRows + cell;  
    if(j < numCols-1)  
     strRows = strRows + " & ";  
   }
    if (i ==  0) {
      strRows += "\\\\\n\\midrule\n";
    } else {
      strRows += " \\\\\n"
    }
   }  
  strRows += "\\bottomrule\n";  
  strRows += "\\end{tabular}\n";   
  strRows += "\\caption{I am the caption} \n";
  strRows += "\\label{t:label}\n";   
  strRows += "\\end{table}\n";  

  ta.setText(strRows);
  ta.setFocus(true);
 
  var closeHandler = app.createServerClickHandler("close");
  close.addClickHandler(closeHandler);
  
  doc.show(app)
 }; 

function close(e) {
  var app = UiApp.getActiveApplication();
  return app.close();
}